package com.usian.filter;


import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class CheckFilter  implements GlobalFilter, Ordered {

    /**
     *
     * 加入过滤器之后url必须带token   不然就过滤掉
     * http://localhost:9527/user/feign/11?token=11
     * @param exchange
     * @param chain
     * @return
     */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        String token = exchange.getRequest().getQueryParams().getFirst("token");
        if (token == null) {
            exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
            return exchange.getResponse().setComplete();//结束请求
        }
        return chain.filter(exchange);//放行
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
